Ok.. This is normally where I mess it up..
If you can check the wireless settings on the router, what channel is it using?
Dont ask me where abouts it will be (Normally advanced wireless settings) as different routers have it in different places, but you need to make sure that the lappy and router are using the same channel, otherwise it will connect but give you the issue you have.
I normally find that this is the one thing that I forget to check, and when somebody visits and wants to use my wireless I sit there for ages thinking.. "Why the hell isnt that connecting..."
Static address... Check whats on the other machines. Then go into your network settings for the USB device (Should be in the network panel or you can get to it via the icon in your task bar if you can see it there).
Then copy the information into the IP address, but make sure the IP address is AT LEAST 1 above your highest DHCP (EG is you have 4 machines.. and their ips are 192.168.0.1, 192.168.0.2 up to 192.168.0.5 Use 192.168.0.6 as this address)
Give it a go, let us know